Stay-bolt structure.



UNITED STATES PATENT OFFICE.

ASSIGNOR TO FLANNERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.

STAY-BOLT STRUCTURE.

Y Application led April 26, 1918. Serial No.. 230,910. Y

To all whom t may concern.' 1

Be it known that I, -ETHANI DoDDs, a citizen of the United States, and-aresident of Pittsburgh, in the county of Allegheny and State ofYPennsylvania, haveV invented certain new and useful Improvements inStay-Bolt Structures, and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in staybolt structures and moreparticularly to the closure for the bearing sleeve,-the object of theinvention being to provide sim ple and ei'icient means whereby the capor closure for the bearing sleeve shall be normally and firmly held toits seat but be permitted to be easily and quickly removed to expose thehead of the staybolt for testing purposes. f

With this and other objects in view, the invention consists in certainnovel features of construction and combinations of parte as hereinafterset forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a sectional View of a stayboltstructure embodying my invention; Fig. 2A is a side elevation; Fig. 3 isa plan view, and Figs. 4, 5, 6 and 7 are views of modilications.

1 represents a bearing sleeve which may be externally threaded andprovided interiorly with a curved surface 2 which serves as a bearingfor the rounded or spherical head 3 of a staybolt 4. The outer endportion of the bearing sleeve is provided with a seat 5 for a cap orclosure 6,-the latter having, in the construction shown in Figs. 1 to 3,an approximately hemispherical shape and its internal dimensions andconiiguration are such as to provide suitableclearance for the head ofthe bolt. l

A. collar 7 is threaded on the bearing sleeve and made with a hexagonalor other angular external configuration for the reception of a wrench.

The cap 6 is provided at diametrically opposite sides with pairs ofperforated lugs or ears 8 and 9 and the collar 7 is provided with anoutwardly projecting ear 10 to enter between the lugs 8. AV pin 8apasses through thelugs 8 and through a hole in the ear 10 whereby thecap will be pivotally attached or hinged to the collar,the holesspecification of Letters Patent.

Patented Mar. 4, 1919.

in thelugs 8 or the hole in the ear 10 being appreciably largerindiameter than that of the hinge pin so as to provide a looseVconnection.

A latch 11 has a loose connection with the `lugs 9 on' the cap by meansof a pivot pin 12,-the hook end 13 of said latch being adapted to engagebehind the collar 7 and the latter may be notched as at 14 to permitproper engagement of the latch with the collar.

When the parts shall have been assembled and placed in position on thebearing sleeve, as shown in Fig. 1, a further turning force applied tothe collar by the application of a suitable wrench, will cause a slight-movement of said collar inwardly on the bearing sleeve and the cap 6 tobe tightly clamped to its seat.

It will be apparent that when the collar 7 is turned in a directionreverse 'to that above described, the cap will be loosened and may bequickly removed to expose the head of the bolt for testing purposes. Itis equally apparent that the cap may be as quickly replaced and clampedonto its seat at the outer end portion of the bearing sleeve.

In the form of the invention shown in Figs. 4 and 5, the cap is providedwith a resilient latch 15 which is made integral with said cap, insteadof employing a pivoted latch as shown in Figs. 1 and 3.

In the form of invention illustrated in Figs. 6 and 7, a plate cap 16instead of a hemi-spherical cap is shown and provided on its top withperforated lugs 17, between 1. In a staybolt structure, the combina- Ytion with a bearing sleeve, and a collar threaded thereon, of a cap forclosing said sleeve having pivotal connection with said collar, andalatch member projecting from said'cap and adapted to engage behind saidcollar. j

2. In a staybolt structure, the combina# tion With a bearing sleeve anda collar said sleeve, said cap having' pivotalE connec- 5 t1on with saidcollar, and a latch pivoted-to said Cap and adapted to engagebehi'n'd'said Collane v '3. Inai st'ayboltstrueture, the combinationwith a bearing sleeve; off. aacapitoseati' ing; sleeve-'fand having;an;outil@arxdlgyaprojects:- 1ng'ear,rafvpivottpim looselyI connectingsard ear with the lug at one side of the cap, and a latch having4 laloose pivotal connection 15 andadapted to engage behind the threadedcollar. f

I'n testimony whereof I have signed this speoioationlin the presence oftwo subscrib- 20 ing Witnesses.

v ETHAN I. DODDS.

Copies-fof thisalatclxit.mathI be?` obte-ined@` fors .fu-Ve cents 6am;byaddressmg .uw commissinen of.; Patents* l y Wshingtonfncw

